Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab92f28cb940e19…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 05:10:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9bfb03a68241e3f20f4a313028fbb2ef SHA-1: b554961b1d770196e275b78891a06b476696b70b SHA-256: cab92f28cb940e19d8e115fe002fb21b532f8d6ff53ec1e54ca762ca4e1ab813
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Hack Online PC'. The heuristic firings indicate that the PDF links to a game hack generator and is flagged by an ML classifier as malicious. The document body and embedded URLs strongly suggest a lure for users seeking game cheats, which is a common pretext for delivering malware or leading to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-hack-online-pc-game-hack In PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/master-coin-hack-game_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/descargar-roblox-hackeado-apk_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-boxing-simulator-cheats_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/free-robux-no-human-vervication_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/roblox-hack-menu-android_GM431946152.pdfIn PDF document text
    • https://www.alarqam.ae/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F04 23240 bytes
SHA-256: cbdcb30b404442ec522e6723838d54d9debef084b318ee27c1e9a49669d7abc8
font_01_sfnt_off0000637d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637D 18232 bytes
SHA-256: 2e126d135fd472f17e04e2c2670c366e67c2359c8a974fc9d6678d50609a09dc

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